Impulse transmitter



-. June 12, 1923.

1,458,545 w. T. POWELL IMPULSE TRANSMITTER Fiiedgnune 15 1919 2 Sheets-Sheet 1 INVENTOR WIHFRED T. POWELL BYAQW- ATTORNEY June 1-2, 1923.

w. "r; POWELL IMPULSE TRANSMITTER 1919 2 Sheets-Sheet 2 Filed June 13 lNVENTQR WMFRED T. POWELL BY A9.

ATTORNEY Patented .lunelz, 1923.

iirrEn: TATES PATENT orricE.

WINFRED r. POWELL, OF ROCHESTER, NEW YORK, ssrenon T0 rHE srEoMBEn GARLSON TELEPHONE Manurnorunrne comrnny, OF ROCHESTER, NEW YORK,

A CORPORATION 01? NEW YORK.

IMPULSE TRANSMITTER.

Application filed (Tune 13, 1919. Serial No. 303,899.

To all whom it may concern Be-it known that I; WINERED T. POWELL,

a citizen of the United States, residing at Rochester, in the county of Monroe and State of New York, have invented certain new and useful Improvements in Impulse.

A feature of this invention is the arrangement in an impulse transmitter having a. forward and return movement on which certain of the lmpulses are transment of the impulse transmitter.

A further feature of this invention is the arrangement of parts in an impulse transmitter, such that the same number of impulsessis transmitted for any digit or character employed in designating orselecting telephone lines.

In the drawings, Fig. lrepresents a front view of the impulse transmitter showing a rotatable finger-hold device and a stop member which limits the forward adjustment of this finger-hold member.

Fig. 2 is a side view of the interiormech} anism with the casing broken away on the line 22 of Fig. 1 looking in the direction of the arrow showing the arrangement of the interior mechanism of the impulse transmitter. I

Fig. 3 shows the front and reverse sides of the A commutator,together with the brushes that co-operate with the various segments of this commutator. I

Fig. 4 represents the front and revers sides of the B commutator with the various brushes that engage conducting portions of this commutator.

Fig. 5 shows another side view of the interior mechanism of the impulse transmitting device with the casing broken away on the line 5 5 of Fig. 1, looking in the direction ofthe arrow.

I Fig. 6 represents a secti onal vie'w taken" on the line 66 of Fig. 5. i

Fig. 7 is a sectional view of the meansfor rotating the A commutator, taken on the line 77 of'Fig. 5, and looking in the direction indicated by the arrow.

Figs. 8 and 9 represent different views of the clutch mechanism for operating the V B commutator. s

In consideringthe structure and operation of the impulse transmitter of the present invention it should be understood that two commutator-s referred to as A and B are provided, each of which is arranged to complete different circuit closuresin each of the various'operating positions to which it is adjusted. It must further be understood that the commutator designated A 1s turned forward with the operation of the mitted on the forward movement, and other impulses transmitted on thereturn move finger-hold member and remains in its advanced position while the finger-hold memberis returning and isthen released just before thefinger-hold member reaches its normal position. The commutator B is operated when the finger-hold member is returning to normal position and completes onlyone revolut on iorany number of mpulses to be transmitted for any character. In the drawmgs, 15 designates a cylindrical casing for the. operating mechanism of the transmitter which is closed atone of its ends and which carries a framework for supporting various elements of the transmitter.' A shaft 17 which is rotatably from each other about its periphery. v There may be as many openingsin this member as there are dili'erent combinations of impulses to be transmitted the sender. A spring 19 is provided which is wound up when the finger-hold member is moved from normal position and operates to return this member and the shaft 17 to this position. Adisc 20 secured tothe shaft 17 is provided with spring actuated pawl 21, which co-o-perates in the control of the B commutator in a manner to bedescribed.

Near the intermediate portion of the shaft 17, there'is secured the disc 22 to the upper surface of which is secured a pawl. 24 and a stop 25. A hollow cylindrical member, or barrel 26, rotates on the upper portion of the shaft 17 as an axis. The lower portion of the barrel 26 is provided with a ratchet wheel 23 which is arranged to be engaged by the pawl 24, to cause the shaft 17 and the barrel 26 to rotate as a unit, as will be described. Directly above the ratchet wheel 23, and also secured to the barrel 26, is the A commutator 27. The structure of this A commutator is best shown in Fig. 3, from which it will be seen that this commutator is formedof a circular disc of insulating material 28, to either side of which there are riveted conducting segments 29 and 30. These segments are riveted together by rivets of conducting material, so that they are electrically connected together. Three brushes'3'1, co-operate with a segment 30, and two brushes 32 co-operate witha conducting segment 29. A spring 33 is wound up'wh'en the barrel member 26 is rotated and operates to return this member to normal position indicated by the pin and stop members 34. A second shaft 35 which is also rotatably mounted is provided with a spring 36, which tends to restore the shaft 35 to normal whenever it has been moved from that position. To the lower end of this shaft is secured a cam 37, provided with five teeth to cooperate with a, star wheel 38 on the lower end of the shaft 39. A disc 59 is also secured to the lower end of the shaft 35 and is provided' with a notch, so positioned that it will be engaged by the pawl 21. The shaft 39 previously mentioned is rotatably mounted in the frame on an axis parallel to the axis of shafts 35 and 17. The upper end of the shaft 39 is provided with a clutch member 40 co-operating with a second clutch member 41 mounted on the lower end of the shaft 42. These clutch members 40 and 41 coeoperate to cause shafts 39 and 42 to rotate together on the rotation of the shaft 39. The shaft 42 near its intermediate portion carries the B commutator 43, which is structurally similar to the A commutator, except that its conducting segments are differently arranged. The. B commutator 43 has two sets of brushes 44 and 45, one set engaging each surface of the B commutator.

The operation of the impulse transmitter is substantially as follows: The subscriber places his finger in any one of the openings ofthe finger-hold member 18 and rotates it in the direction of the arrow until his finger engages the stop 46. r This operation winds up the spring 19 and rotates the disc 20 with its pawl 21 until this pawl engages the notch indisc 59. The disc 22 isalso rotated with the shaft 17 in the direction of the arrow, causing the pawl 47 mounted on the frame to disengage, the stop 25, and permits the pawl 24 to engage the ratchet wheel 23, so that in the further rotation of the fingerhold member 18 and the shaft 17, the shaft 26 will be rotated therewith. When the shaft 26 is thus rotated, the A commutator 27 is rotated to cause it totake a desired setting with respect to the brushes 31 and 32, and the spring 33 is wound up to cause the shaft 26 and the members carried thereby to be rotated to normal when the pawls 24 and 47 disengage the wheel 23. This operation of restoring the shaft 26 to normal occurs when the finger-hold member 18 has almost reached its normal position, whenpawl 24 has engaged arm 50 and pawl 47 has engaged stop 25.

\Vhenthe shaft 17 is being returned under the control of the spring 19, pawl 21 which is now in engagement with the notch of the disc 59 is moved. with this disc 59, to cause the rotation of the cam 37, and this cam by means of its five teeth gives the star wheel 38 and the shaft 39 secured to it, one complete rotation. The shaft 39 is thus rotated and through the agency of the clutch members 40 and 41, the shaft 42 is given one complete revolution. This causes the B commutator 43 to close various circuits through its sets of brushes 44 and; 45. v

In the further operation of restoring the finger-hold member '18 to normal position, the pawl 21 is moved downward until its projection engages the stop 49 carried by the frame, which raises the pawl 21 out of engagement with the notch of the disc 59 and permits the shaft 35 to be rotated to normal position determined by stop 60 (Fig, 6) under the control of its spring 36. While the shaft 35 is beingrestored to normal, the teeth of the cam 37 carried by it reengages the star wheel 38, which rotates the shaft 39 to normal 7 position. The clutch members 40 and 41 however do not engage each other at. this time, so that shaft 42 is not rotated.

Just before the finger-hold member 18 has reached normal position, the pawl 47 carried by an arm 50 of the frame is disengaged from the ratchet wheel 23 by stop '25 and the barrel 26 is permitted to rotate independently of'the shaft 17... When this takes place the barrel 26 is rotated under the control of and if the functions of the present impulse transmitter are still maintained.

What I claim is: 1. In an impulse transmitter, a manually impulses, a commutator and a circuit closing device cooperating therewith, and means actuated by said manually adjustable device for causing said commutator to make one complete revolution and only one for any setting of said device. I

2. In an impulse transmitter, manually adjustable means for setting up line desig nations, and a pluralitygof commutators adjustable at different times in response to the setting of said means to transmit combinations of impulses in accordance with any designation.

3. In an impulse transmitter, a variably adjustable member mounted to move'forward and back, said member being provided with finger-holds for each combination of impulses transmitted, and a plurality of commutators controlled at different times by said member for transmitting various combinations of impulses.

4. In a calling device for a two-wire telephone system, an impulse transmitter, a rotar member 0011131011111 said im ulse trans- IV s mitter, and means whereby said impulse transmltter sends a series of impulses dur- 1ng its forward rotation and whereby said impulse transmitter sends a series of im-,

pulses during its backward rotation.

5. In an impulse transmitting device for a two wire telephone system, a plurality of fixed contacts, a plurality ofv commutators each having thereona plurality of contacts arranged in groups, means for manually operating certain of said commutators with re spect to the fixed contacts to position any combination of groups'ofcontactsin operative relation thereto, and means for moving said commutators at will past the fixed contacts whereby'series of impulses, always the same in number, are transmitted.

6. In an impulse transmitting device, a plurality of independently movable commutators each having contacts thereon, fixed contacts co-operating wlth the contacts on said commutators, means for manually and selectively adjusting one of said commutators, and means for causingthe operation of the other commutator,-said commutators co-operating to transmit combinations of impulses. i

7.111 an impulse transmitting device, a plurality of independently movable commutators co-operating to send series of impulses, one of said commutators being variably adjustable and'the other invariably adjustable, and means for operating said commutators to transmit combinations of'impulses. v I

8. In an impulse transmitter, a plurality of independently movable commutators for transmitting various series of impulses, and means for operating 1 one of said commutators and subsequently. operating another commutator. I 1

'9. In an impulse transmitter, a plurality ofindependently movable commutators for transmitting various series of impulses, and means for selectively operating one of said commutators and subsequently operating another commutator. I

10. In an impulse transmitter, a plurality of independently movable commutators for transmitting series of impulses, and means i for selectively operating one of said commutators and subsequently invariably adjusting another commutator} i i 11. In an impulse transmitter, a variably adjustable member mounted to move forward and back, a plurality of commutators for transmitting series of impulses and means under the control of said variably adjustable member for selectively operating.

one of said commutators and subsequently operating theother commutator. 1

12. In an impulse transmitter, a variably adjustable member mounted to move forr I ward andback, a plurality of commutators for transmitting series of impulses, and

means under the control of said variably adjustable member for selectively operating one of said commutators and subsequently invariably operating the other commutator.

13. In an impulse transmitter, a. dial mounted to rotate forward and back, a plurality of commutators controlled thereby,

and means for operating the first commu- I tator during the forward and return movement of said dial and for operating said second commutator only during the return movement of said dial.

14. In an impulse transmitter, a dial mounted to rotateforward and back, aplurality of commutators controlled thereby, and means for operating the first commu tator during the forward and return movement ofsaid dial and for operatingsaid second commutator to complete a revolution during the returnmovement of said dial. p

'15. In an impulse transmitting device, a

plurality of commutators, each commutator comprising a circular disk of insulating material with conducting segments secured thereto, a fixed contact co-operating with the segments of each commutator, means for manually and selectively. operating one I of said commutators, and for causing the operation of the other commutator, said commutators co-operating to transmitseries of impulses. I

16. In an impulse transmitting device, a

number plate having characters thereon,'a

movable finger hold'member with openings normally positioned above said characters, a rotatable shaft] to which said finger hold member is secured, a spring motorv for returning said shaft and finger hold member to its normal position when itis removed therefrom, a second shaft also rotatalol y mounted, said shaft having secured thereto a commutator, said commutator comprising a circular disk of insulating material With conductive segmentsthereon, a fixed brush for engaging said conducting segments, a second rotatable shaft With a commutator secured thereto, a fixed brush engaging said second commutator and means including said finger-hold member for operating said commutators to transmit series of impulses.

In Witness whereof, I hereunto subscribe my name this 12th day of June, A. D. 1919.

VVINFRED T. POWELL. 

